Description
BSE has scheduled a mock trading session for the Equity segment on Saturday, January 10th, 2026, including testing of interoperable segment business continuity mechanism with NSE outage simulation.
Summary
BSE has scheduled a mock trading session for the Equity segment on Saturday, January 10th, 2026. The session will test various trading functionalities including call auction sessions, risk-reduction mode, trading halt, and block deals. A new BOLT Pro TWS version 12.50 will be released. Additionally, BSE and NSE will test the interoperable segment business continuity mechanism by simulating an NSE outage scenario where BSE will serve as an alternative trading venue for NSE exclusive securities.
Key Points
- Mock trading session scheduled for Saturday, January 10th, 2026
- New BOLT Pro TWS version 12.50 to be released (details in separate circular)
- Testing will cover various functionalities: call auction sessions, risk-reduction mode, trading halt, block deals
- Login window: 10:15 AM to 10:45 AM
- Continuous Trading T+1: 11:15 AM to 02:00 PM
- Continuous Trading T+0: 11:15 AM to 01:30 PM
- BSE-NSE interoperability test: NSE outage will be simulated and BSE will be invoked as alternate trading venue for NSE exclusive securities
- Broadcast message will inform participants: “NSEEQ excl scrips avlble from hh:mm”
- Third-party trading platform users can participate in testing
- Feedback must be submitted by 2:00 PM on the mock trading day
Regulatory Changes
No new regulatory changes. This circular implements the existing SEBI directive (SEBI/HO/MRD/TPD/P/CIR/2024/167 dated November 28, 2024) regarding business continuity mechanism for the interoperable segment, which was previously implemented via BSE circular no 20250328-18 dated March 28, 2025.
Compliance Requirements
- Trading members are requested to participate in the mock trading session
- Members using third-party trading platforms should test their applications during the session
- All members should provide feedback by 2:00 PM on the mock trading day
- Members should be prepared for the NSE outage simulation and BSE invocation as alternate venue
- Contact BSE Helpdesk (022-45720400/600, 022-69158500; bsehelp@bseindia.com) or BSE Tech Support (022-22728053; bse.tech@bseindia.com) for queries
Important Dates
- January 10, 2026: Mock trading session date
- 10:15 AM - 10:45 AM: Login window
- 10:45 AM - 11:00 AM: Morning Block Deal Window
- 11:00 AM - 11:08 AM: Pre-Open Order Entry period (random stoppage in last 1 minute)
- 11:08 AM - 11:15 AM: Pre-Open Matching period
- 11:15 AM - 02:00 PM: Continuous Trading T+1
- 11:15 AM - 01:30 PM: Continuous Trading T+0
- 11:00 AM - 11:45 AM: Special Pre-Open for IPO & Re-listed scrips Order Entry (random stoppage in last 10 minutes)
- 11:45 AM - 12:00 PM: Special Pre-Open Matching period
- 12:00 PM - 02:00 PM: Continuous Trading for SPOS Scrips
- 11:30 AM - 01:30 PM: Periodic Call Auction (2 sessions of 1 hour)
- 12:00 PM - 12:45 PM: Auction for Settlement Details
- 12:50 PM - 01:05 PM: Afternoon Block Deal Window
- 02:00 PM - 02:10 PM: Closing session
- 02:10 PM - 02:20 PM: Post-closing session
- 01:45 PM / 02:30 PM: Trade Modification windows (T+0 / T+1)
- By 2:00 PM: Feedback submission deadline
Impact Assessment
Market Impact: None - this is a mock trading session on a non-trading day (Saturday) with no impact on actual market operations.
Operational Impact: Low - voluntary participation for testing purposes. Members can use this opportunity to test their trading systems, including third-party platforms, in a simulated environment.
Technical Impact: Medium for testing purposes - the session will test critical functionalities including the newly implemented BSE-NSE interoperability mechanism for business continuity. The NSE outage simulation will help validate the alternate trading venue mechanism.
Member Preparedness: The mock session helps members familiarize themselves with various trading scenarios including exceptional market conditions, new TWS version features, and the business continuity mechanism for handling exchange outages.
Impact Justification
Routine mock trading session for testing purposes with no impact on regular trading or market participants' obligations